2 * Zoran ZR36016 basic configuration functions
4 * Copyright (C) 2001 Wolfgang Scherr <scherr@net4you.at>
6 * $Id: zr36016.c,v 1.1.2.14 2003/08/20 19:46:55 rbultje Exp $
8 * ------------------------------------------------------------------------
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 * ------------------------------------------------------------------------
27 #define ZR016_VERSION "v0.7"
29 #include <linux/module.h>
30 #include <linux/init.h>
31 #include <linux/slab.h>
32 #include <linux/delay.h>
34 #include <linux/types.h>
35 #include <linux/wait.h>
37 /* includes for structures and defines regarding video
38 #include<linux/videodev.h> */
40 /* I/O commands, error codes */
45 #include <linux/videodev.h>
47 /* headerfile of this module */
51 #include"videocodec.h"
53 /* it doesn't make sense to have more than 20 or so,
54 just to prevent some unwanted loops */
57 /* amount of chips attached via this driver */
58 static int zr36016_codecs = 0;
60 /* debugging is available via module parameter */
63 module_param(debug, int, 0);
64 MODULE_PARM_DESC(debug, "Debug level (0-4)");
66 #define dprintk(num, format, args...) \
69 printk(format, ##args); \
72 /* =========================================================================
73 Local hardware I/O functions:
75 read/write via codec layer (registers are located in the master device)
76 ========================================================================= */
78 /* read and write functions */
80 zr36016_read (struct zr36016 *ptr,
85 // just in case something is wrong...
86 if (ptr->codec->master_data->readreg)
88 (ptr->codec->master_data->
89 readreg(ptr->codec, reg)) & 0xFF;
92 KERN_ERR "%s: invalid I/O setup, nothing read!\n",
95 dprintk(4, "%s: reading from 0x%04x: %02x\n", ptr->name, reg,
102 zr36016_write (struct zr36016 *ptr,
106 dprintk(4, "%s: writing 0x%02x to 0x%04x\n", ptr->name, value,
109 // just in case something is wrong...
110 if (ptr->codec->master_data->writereg) {
111 ptr->codec->master_data->writereg(ptr->codec, reg, value);
115 "%s: invalid I/O setup, nothing written!\n",
119 /* indirect read and write functions */
120 /* the 016 supports auto-addr-increment, but
121 * writing it all time cost not much and is safer... */
123 zr36016_readi (struct zr36016 *ptr,
128 // just in case something is wrong...
129 if ((ptr->codec->master_data->writereg) &&
130 (ptr->codec->master_data->readreg)) {
131 ptr->codec->master_data->writereg(ptr->codec, ZR016_IADDR, reg & 0x0F); // ADDR
132 value = (ptr->codec->master_data->readreg(ptr->codec, ZR016_IDATA)) & 0xFF; // DATA
136 "%s: invalid I/O setup, nothing read (i)!\n",
139 dprintk(4, "%s: reading indirect from 0x%04x: %02x\n", ptr->name,
145 zr36016_writei (struct zr36016 *ptr,
149 dprintk(4, "%s: writing indirect 0x%02x to 0x%04x\n", ptr->name,
152 // just in case something is wrong...
153 if (ptr->codec->master_data->writereg) {
154 ptr->codec->master_data->writereg(ptr->codec, ZR016_IADDR, reg & 0x0F); // ADDR
155 ptr->codec->master_data->writereg(ptr->codec, ZR016_IDATA, value & 0x0FF); // DATA
159 "%s: invalid I/O setup, nothing written (i)!\n",
163 /* =========================================================================
164 Local helper function:
167 ========================================================================= */
169 /* version kept in datastructure */
171 zr36016_read_version (struct zr36016 *ptr)
173 ptr->version = zr36016_read(ptr, 0) >> 4;
177 /* =========================================================================
178 Local helper function:
180 basic test of "connectivity", writes/reads to/from PAX-Lo register
181 ========================================================================= */
184 zr36016_basic_test (struct zr36016 *ptr)
188 zr36016_writei(ptr, ZR016I_PAX_LO, 0x55);
189 dprintk(1, KERN_INFO "%s: registers: ", ptr->name);
190 for (i = 0; i <= 0x0b; i++)
191 dprintk(1, "%02x ", zr36016_readi(ptr, i));
194 // for testing just write 0, then the default value to a register and read
195 // it back in both cases
196 zr36016_writei(ptr, ZR016I_PAX_LO, 0x00);
197 if (zr36016_readi(ptr, ZR016I_PAX_LO) != 0x0) {
200 "%s: attach failed, can't connect to vfe processor!\n",
204 zr36016_writei(ptr, ZR016I_PAX_LO, 0x0d0);
205 if (zr36016_readi(ptr, ZR016I_PAX_LO) != 0x0d0) {
208 "%s: attach failed, can't connect to vfe processor!\n",
212 // we allow version numbers from 0-3, should be enough, though
213 zr36016_read_version(ptr);
214 if (ptr->version & 0x0c) {
217 "%s: attach failed, suspicious version %d found...\n",
218 ptr->name, ptr->version);
222 return 0; /* looks good! */
225 /* =========================================================================
226 Local helper function:
228 simple loop for pushing the init datasets - NO USE --
229 ========================================================================= */
232 static int zr36016_pushit (struct zr36016 *ptr,
239 dprintk(4, "%s: write data block to 0x%04x (len=%d)\n",
240 ptr->name, startreg,len);
242 zr36016_writei(ptr, startreg++, data[i++]);
249 /* =========================================================================
250 Basic datasets & init:
253 ========================================================================= */
255 // needed offset values PAL NTSC SECAM
256 static const int zr016_xoff[] = { 20, 20, 20 };
257 static const int zr016_yoff[] = { 8, 9, 7 };
260 zr36016_init (struct zr36016 *ptr)
262 // stop any processing
263 zr36016_write(ptr, ZR016_GOSTOP, 0);
265 // mode setup (yuv422 in and out, compression/expansuon due to mode)
266 zr36016_write(ptr, ZR016_MODE,
267 ZR016_YUV422 | ZR016_YUV422_YUV422 |
268 (ptr->mode == CODEC_DO_COMPRESSION ?
269 ZR016_COMPRESSION : ZR016_EXPANSION));
272 zr36016_writei(ptr, ZR016I_SETUP1,
273 (ptr->xdec ? (ZR016_HRFL | ZR016_HORZ) : 0) |
274 (ptr->ydec ? ZR016_VERT : 0) | ZR016_CNTI);
275 zr36016_writei(ptr, ZR016I_SETUP2, ZR016_CCIR);
278 // (no extra offset for now, norm defines offset, default width height)
279 zr36016_writei(ptr, ZR016I_PAX_HI, ptr->width >> 8);
280 zr36016_writei(ptr, ZR016I_PAX_LO, ptr->width & 0xFF);
281 zr36016_writei(ptr, ZR016I_PAY_HI, ptr->height >> 8);
282 zr36016_writei(ptr, ZR016I_PAY_LO, ptr->height & 0xFF);
283 zr36016_writei(ptr, ZR016I_NAX_HI, ptr->xoff >> 8);
284 zr36016_writei(ptr, ZR016I_NAX_LO, ptr->xoff & 0xFF);
285 zr36016_writei(ptr, ZR016I_NAY_HI, ptr->yoff >> 8);
286 zr36016_writei(ptr, ZR016I_NAY_LO, ptr->yoff & 0xFF);
288 /* shall we continue now, please? */
289 zr36016_write(ptr, ZR016_GOSTOP, 1);
292 /* =========================================================================
295 this functions are accessed by the master via the API structure
296 ========================================================================= */
298 /* set compression/expansion mode and launches codec -
299 this should be the last call from the master before starting processing */
301 zr36016_set_mode (struct videocodec *codec,
304 struct zr36016 *ptr = (struct zr36016 *) codec->data;
306 dprintk(2, "%s: set_mode %d call\n", ptr->name, mode);
308 if ((mode != CODEC_DO_EXPANSION) && (mode != CODEC_DO_COMPRESSION))
317 /* set picture size */
319 zr36016_set_video (struct videocodec *codec,
321 struct vfe_settings *cap,
322 struct vfe_polarity *pol)
324 struct zr36016 *ptr = (struct zr36016 *) codec->data;
326 dprintk(2, "%s: set_video %d.%d, %d/%d-%dx%d (0x%x) call\n",
327 ptr->name, norm->HStart, norm->VStart,
328 cap->x, cap->y, cap->width, cap->height,
331 /* if () return -EINVAL;
332 * trust the master driver that it knows what it does - so
333 * we allow invalid startx/y for now ... */
334 ptr->width = cap->width;
335 ptr->height = cap->height;
336 /* (Ronald) This is ugly. zoran_device.c, line 387
337 * already mentions what happens if HStart is even
338 * (blue faces, etc., cr/cb inversed). There's probably
339 * some good reason why HStart is 0 instead of 1, so I'm
340 * leaving it to this for now, but really... This can be
341 * done a lot simpler */
342 ptr->xoff = (norm->HStart ? norm->HStart : 1) + cap->x;
343 /* Something to note here (I don't understand it), setting
344 * VStart too high will cause the codec to 'not work'. I
345 * really don't get it. values of 16 (VStart) already break
346 * it here. Just '0' seems to work. More testing needed! */
347 ptr->yoff = norm->VStart + cap->y;
348 /* (Ronald) dzjeeh, can't this thing do hor_decimation = 4? */
349 ptr->xdec = ((cap->decimation & 0xff) == 1) ? 0 : 1;
350 ptr->ydec = (((cap->decimation >> 8) & 0xff) == 1) ? 0 : 1;
355 /* additional control functions */
357 zr36016_control (struct videocodec *codec,
362 struct zr36016 *ptr = (struct zr36016 *) codec->data;
363 int *ival = (int *) data;
365 dprintk(2, "%s: control %d call with %d byte\n", ptr->name, type,
369 case CODEC_G_STATUS: /* get last status - we don't know it ... */
370 if (size != sizeof(int))
375 case CODEC_G_CODEC_MODE:
376 if (size != sizeof(int))
381 case CODEC_S_CODEC_MODE:
382 if (size != sizeof(int))
386 /* not needed, do nothing */
394 /* not available, give an error */
404 /* =========================================================================
405 Exit and unregister function:
407 Deinitializes Zoran's JPEG processor
408 ========================================================================= */
411 zr36016_unset (struct videocodec *codec)
413 struct zr36016 *ptr = codec->data;
416 /* do wee need some codec deinit here, too ???? */
418 dprintk(1, "%s: finished codec #%d\n", ptr->name,
430 /* =========================================================================
431 Setup and registry function:
433 Initializes Zoran's JPEG processor
435 Also sets pixel size, average code size, mode (compr./decompr.)
436 (the given size is determined by the processor with the video interface)
437 ========================================================================= */
440 zr36016_setup (struct videocodec *codec)
445 dprintk(2, "zr36016: initializing VFE subsystem #%d.\n",
448 if (zr36016_codecs == MAX_CODECS) {
450 KERN_ERR "zr36016: Can't attach more codecs!\n");
454 codec->data = ptr = kzalloc(sizeof(struct zr36016), GFP_KERNEL);
456 dprintk(1, KERN_ERR "zr36016: Can't get enough memory!\n");
460 snprintf(ptr->name, sizeof(ptr->name), "zr36016[%d]",
462 ptr->num = zr36016_codecs++;
466 res = zr36016_basic_test(ptr);
468 zr36016_unset(codec);
472 ptr->mode = CODEC_DO_COMPRESSION;
479 dprintk(1, KERN_INFO "%s: codec v%d attached and running\n",
480 ptr->name, ptr->version);
485 static const struct videocodec zr36016_codec = {
486 .owner = THIS_MODULE,
488 .magic = 0L, // magic not used
490 CODEC_FLAG_HARDWARE | CODEC_FLAG_VFE | CODEC_FLAG_ENCODER |
492 .type = CODEC_TYPE_ZR36016,
493 .setup = zr36016_setup, // functionality
494 .unset = zr36016_unset,
495 .set_mode = zr36016_set_mode,
496 .set_video = zr36016_set_video,
497 .control = zr36016_control,
498 // others are not used
501 /* =========================================================================
502 HOOK IN DRIVER AS KERNEL MODULE
503 ========================================================================= */
506 zr36016_init_module (void)
508 //dprintk(1, "ZR36016 driver %s\n",ZR016_VERSION);
510 return videocodec_register(&zr36016_codec);
514 zr36016_cleanup_module (void)
516 if (zr36016_codecs) {
518 "zr36016: something's wrong - %d codecs left somehow.\n",
521 videocodec_unregister(&zr36016_codec);
524 module_init(zr36016_init_module);
525 module_exit(zr36016_cleanup_module);
527 MODULE_AUTHOR("Wolfgang Scherr <scherr@net4you.at>");
528 MODULE_DESCRIPTION("Driver module for ZR36016 video frontends "
530 MODULE_LICENSE("GPL");